Improvement in sewing-machines



" 2 Sheets-Sheet I.

A. MOLTZ. Sewing Machine.

P atejntgd May,17, 1870.

N, PETERS. Phmumo m mr. Washington. 0.0.

2 Sheets 'SheetZ A. MOLTTZ. Sewing Machine! Patented May 17. 1870.

UNIT D STATES PAT NT rFIcE.

' ADAM MOLTZ, OF NEW YORK, N. Y.

I IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 103,070, dated May 17, 1870.

To all whom it may concern:

Be it known that I, ADAM MOLTZ, of New York, in the county of New York and State of New York, have invented certain Improvements in Sewing-Machines, of which the following is a specification.

The nature of my invention consists in dividing the driving-shaft into sections for the purpose of obtaining rotary and intermittent motions from the same shaft,whereby the movements of the needle-bar are such as to not only make a large loop, but enable me to employa large shuttle, carrying a spool of from seventy-live to one hundred yards capacity, (or about the amount of thread required for a days work,) thereby obviating the necessity of stop ping the machine every half an hour to replenish the thread by taking out the shuttle, removing the empty spool, and inserting afilled one in its place; and it further consists of a direct feed movementsuited alike to thick and thin material, said movement being composed of slides and cams operated by the rockershaft, as hereinafter more fully described.

Figure 1 represents a plan or top View of my improved sewing-machine with part of overhanging arm removed; Fig. 2, a side elevation and Fig. 3, a sectional view of divided shaft, showinglink-connection. Fig.4, Sheet2, is a vertical central and longitudinal section of the machine; Fig. 5, a front end elevation of same; Fig. 6, a sectional view, showing cams and springs for operating the feed; and Fig. 7, a sectional view through shuttle and spool,

- showing toggle-joint connection between shuttle-driver and rocker-shaft.

In the said drawings, A indicates the table of the machine 5 B, the goose-neck or arm attached to said table, which sustains in proper bearings (see Fig. 4) the divided driving-shaft, needle-bar, pulley, and fly wheel.

D E F is the divided drivingshaft, carrying on its outer section, F, the fly-wheel G and pulley H. The sections E F of the driving-shaft are connected by an adjustable crank-armJ, said crank-arm carrying the connecting-link J, which connects the driving with the rocker shaft. The sections-D E of the driving-shaft are provided with cams K L, carrying pins M N, which play into an open link, 0, said link 0 being pivoted at one end, P, to an upright post, Q, attached to the goose-neck, and at its opposite end said link 0 isprovided with astop bis the bobbin from which thethread is drawn through the loops 0 d e, the loop at being a spring-loop and partakingof the movements of the needle-carrier for the purpose of giving the desired tension to the thread-and taking up the slack as the needle leaves the cloth.

f is a hollow tube attached to the face-plate of the goose-neck, has a rectangular slot, 9 g and contains a spiral spring, h, for operating the presser t, which can be elevated by its knob 70 and its foot 1 turned from 0% the cloth by passing the knob into 9 of the slot. (See Fig. 5.) p

m is the rocker-shaft, sustained in bearings n n below the table A, said rocker-shaft being connected by its adjustable collar m with the driving-shaft by the 'link J, and carrying near its forward end another adjustable collar, 0 which receives a link, p, which is also connected by a hinge-joint, q, with the shuttledriver 1, forming a toggle-joint connection between rocker-shaft and shuttle-driver. (See Fig. 7.) This driver 4 slides in a bed, .9, in the table, and embraces the shuttle t in front and rear by its fingers u o,- and w is the spool carried by said shuttle. The rocker-shaft m at its forward end carries an adjustable plate, .90, to which two arms, 3 z, are pivoted. These arms are provided with cam-pins 0H1), which play in slots 0' d in theconfining-platee. One of these arms, y, has a hook, f, which acts on a projection, g, on a small cam, h, and as the arm is operated by the rocker-shaft and the stitch made by the needle this hook catches the projection 9, drawing it downward and elevating a link, i, pivoted to the cam h and to the feed-bar, said link a" in turn elevating the serrated feed-bar j, holding the same up to the cloth the required time for the other arm, e, by its joint link-connection Z2, to push the serrated feedbar forward, when the hook f of the arm y will drop the projection g, permitting the feed-bar to fall, (for thcnext stitch,) when the feed-bar will be drawn backward by the arm 2 2 until the next forward movement of the feed-bar is required.

k is the stitch -regulating finger bar, attached by a clamping-screw, Z, to an arm, m, extending downward from the table. The

feed-bar abuts against this finger-bar 7c, the length of stitch being determined by moving the finger-bar head a toward or away from the feed-bar and clamping the same.

What I claim is- ADAM MOLTZ.

Witnesses:

ARTHUR NEILL, EMILE MoL'rz. 

